3 // Part of the Architektonas Project
4 // (C) 2011 Underground Software
5 // See the README and GPLv3 files for licensing and warranty information
7 // JLH = James Hammons <jlhamm@acm.org>
10 // --- ---------- -------------------------------------------------------------
11 // JLH 03/22/2011 Created this file
12 // JLH 09/29/2011 Added middle mouse button panning
17 // - Redo rendering code to *not* use Qt's transform functions, as they are tied
18 // to a left-handed system and we need a right-handed one. [DONE]
24 // Uncomment this for debugging...
26 //#define DEBUGFOO // Various tool debugging...
27 //#define DEBUGTP // Toolpalette debugging...
29 #include "drawingview.h"
32 #include "mathconstants.h"
36 #include "dimension.h"
37 #include "drawcircleaction.h"
38 #include "drawlineaction.h"
43 DrawingView::DrawingView(QWidget * parent/*= NULL*/): QWidget(parent),
44 // The value in the settings file will override this.
45 useAntialiasing(true),
46 gridBackground(256, 256),
47 scale(1.0), offsetX(-10), offsetY(-10),
48 document(Vector(0, 0)),
49 // gridSpacing(32.0), collided(false), rotateTool(false), rx(150.0), ry(150.0),
50 gridSpacing(12.0), collided(false), rotateTool(false), rx(150.0), ry(150.0),
51 scrollDrag(false), addLineTool(false), toolAction(NULL)
53 setBackgroundRole(QPalette::Base);
54 setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
56 // toolPalette = new ToolWindow();
58 // setCursor(cur[TOOLSelect]);
59 // setMouseTracking(true);
61 Line * line = new Line(Vector(5, 5), Vector(50, 40), &document);
63 document.Add(new Line(Vector(50, 40), Vector(10, 83), &document));
64 document.Add(new Line(Vector(10, 83), Vector(17, 2), &document));
65 document.Add(new Circle(Vector(100, 100), 36, &document));
66 document.Add(new Circle(Vector(50, 150), 49, &document));
67 document.Add(new Arc(Vector(300, 300), 32, PI / 4.0, PI * 1.3, &document)),
68 document.Add(new Arc(Vector(200, 200), 60, PI / 2.0, PI * 1.5, &document));
70 Dimension * dimension = new Dimension(Vector(0, 0), Vector(0, 0), DTLinear, &document);
71 line->SetDimensionOnLine(dimension);
72 document.Add(dimension);
74 // Alternate way to do the above...
75 line->SetDimensionOnLine();
77 // connect(toolAction, SIGNAL(ObjectReady(Object *)), this,
78 // SLOT(AddNewObjectToDocument(Object *)));
79 //This works, now how to scroll it???
80 // QPixmap pm(256, 256);
81 QPainter pmp(&gridBackground);
83 pmp.fillRect(0, 0, 256, 256, Qt::lightGray);
85 pmp.fillRect(0, 64, 64, 64, Qt::darkGray);
86 pmp.fillRect(0, 192, 64, 64, Qt::darkGray);
87 pmp.fillRect(64, 0, 64, 64, Qt::darkGray);
88 pmp.fillRect(64, 128, 64, 64, Qt::darkGray);
89 pmp.fillRect(128, 64, 64, 64, Qt::darkGray);
90 pmp.fillRect(128, 192, 64, 64, Qt::darkGray);
91 pmp.fillRect(192, 0, 64, 64, Qt::darkGray);
92 pmp.fillRect(192, 128, 64, 64, Qt::darkGray);
94 pmp.fillRect(0, 0, 256, 256, QColor(240, 240, 240));
95 pmp.setPen(QPen(QColor(210, 210, 255), 2.0, Qt::SolidLine));
96 for(int i=0; i<255; i+=12)
97 pmp.drawLine(i, 0, i, 255);
98 for(int i=0; i<255; i+=12)
99 pmp.drawLine(0, i, 255, i);
102 UpdateGridBackground();
105 void DrawingView::SetRotateToolActive(bool state/*= true*/)
111 void DrawingView::SetAddLineToolActive(bool state/*= true*/)
113 if (state)// && toolAction == NULL)
118 addCircleTool = false;
119 toolAction = new DrawLineAction();
120 connect(toolAction, SIGNAL(ObjectReady(Object *)), this,
121 SLOT(AddNewObjectToDocument(Object *)));
123 else if (!state && addLineTool && toolAction)
131 //printf("DrawingView::SetAddLineToolActive(). toolAction=%08X\n", toolAction);
134 void DrawingView::SetAddCircleToolActive(bool state/*= true*/)
136 if (state)// && toolAction == NULL)
142 toolAction = new DrawCircleAction();
143 connect(toolAction, SIGNAL(ObjectReady(Object *)), this,
144 SLOT(AddNewObjectToDocument(Object *)));
146 else if (!state && addCircleTool && toolAction)
152 addCircleTool = state;
154 //printf("DrawingView::SetAddCircleToolActive(). toolAction=%08X\n", toolAction);
157 void DrawingView::UpdateGridBackground(void)
160 // Shift the background to match our scrolling...
161 QBrush newBrush = *backgroundBrush;
162 //QMatrix brushMatrix = backgroundBrush->matrix();
163 QTransform brushMatrix = backgroundBrush->transform();
164 brushMatrix.translate(Painter::origin.x, Painter::origin.y);
165 //brushMatrix.translate(15.0, 15.0);
166 //backgroundBrush->setMatrix(brushMatrix);
167 //backgroundBrush->setTransform(brushMatrix);
168 newBrush.setTransform(brushMatrix);
169 QPalette pal = palette();
170 //pal.setBrush(backgroundRole(), *backgroundBrush);
171 pal.setBrush(backgroundRole(), newBrush);
173 //Background painting does not honor the transformation matrix (either one)...
177 #define BG_BRUSH_SPAN 72
178 // Transform the origin to Qt coordinates
179 Vector pixmapOrigin = Painter::CartesianToQtCoords(Vector());
180 int x = (int)pixmapOrigin.x;
181 int y = (int)pixmapOrigin.y;
182 // Use mod arithmetic to grab the correct swatch of background
183 // Problem with mod 128: Negative numbers screw it up... [FIXED]
184 x = (x < 0 ? 0 : BG_BRUSH_SPAN - 1) - (x % BG_BRUSH_SPAN);
185 y = (y < 0 ? 0 : BG_BRUSH_SPAN - 1) - (y % BG_BRUSH_SPAN);
187 // Here we grab a section of the bigger pixmap, so that the background
188 // *looks* like it's scrolling...
189 QPixmap pm = gridBackground.copy(x, y, BG_BRUSH_SPAN, BG_BRUSH_SPAN);
190 QPalette pal = palette();
191 pal.setBrush(backgroundRole(), QBrush(pm));
192 setAutoFillBackground(true);
197 void DrawingView::AddNewObjectToDocument(Object * object)
201 object->Reparent(&document);
202 document.Add(object);
205 //printf("DrawingView::AddNewObjectToDocument(). object=%08X\n", object);
208 QPoint DrawingView::GetAdjustedMousePosition(QMouseEvent * event)
210 // This is undoing the transform, e.g. going from client coords to local coords.
211 // In essence, the height - y is height + (y * -1), the (y * -1) term doing the
212 // conversion of the y-axis from increasing bottom to top.
213 return QPoint(offsetX + event->x(), offsetY + (size().height() - event->y()));
216 QPoint DrawingView::GetAdjustedClientPosition(int x, int y)
218 // VOODOO ALERT (ON Y COMPONENT!!!!) (eh?)
219 // No voodoo here, it's just grouped wrong to see it. It should be:
220 // -offsetY + (size.height() + (y * -1.0)) <-- this is wrong, offsetY should be positive
221 return QPoint(-offsetX + x, (size().height() - (-offsetY + y)) * +1.0);
224 void DrawingView::paintEvent(QPaintEvent * /*event*/)
226 QPainter qtPainter(this);
227 Painter painter(&qtPainter);
229 // qtPainter.setBackground(QBrush(Qt::DiagCrossPattern));
230 // qtPainter.setBackgroundMode(Qt::OpaqueMode);
233 qtPainter.setRenderHint(QPainter::Antialiasing);
235 Painter::screenSize = Vector(size().width(), size().height());
236 Object::SetViewportHeight(size().height());
238 // Draw coordinate axes
240 painter.SetPen(QPen(Qt::blue, 1.0, Qt::DotLine));
241 painter.DrawLine(0, -16384, 0, 16384);
242 painter.DrawLine(-16384, 0, 16384, 0);
244 // Draw supplemental (tool related) points
245 // NOTE that this can be done as an action!
246 // In that case, we would need access to the document...
249 painter.SetPen(QPen(QColor(0, 200, 0), 2.0, Qt::SolidLine));
250 painter.DrawLine(rx - 10, ry, rx + 10, ry);
251 painter.DrawLine(rx, ry - 10, rx, ry + 10);
254 // Maybe we can make the grid into a background brush instead, and let Qt deal
259 painter.setPen(QPen(QColor(90, 90, 90), 1.0, Qt::DotLine));
261 //these two loops kill performance!
262 // Also, these overwrite our coordinate axes
263 for(double x=0; x<size().width(); x+=gridSpacing*10.0)
264 painter.drawLine((int)x, -16384, (int)x, 16384);
266 for(double y=0; y<size().height(); y+=gridSpacing*10.0)
267 painter.drawLine(-16384, (int)y, 16384, (int)y);
270 // painter.SetPen(QPen(Qt::black, 1.0, Qt::SolidLine));
272 // for(double x=0; x<size().width(); x+=gridSpacing)
273 // for(double y=0; y<size().height(); y+=gridSpacing)
274 // painter.DrawPoint((int)x, (int)y);
276 // The top level document takes care of rendering for us...
277 document.Draw(&painter);
280 toolAction->Draw(&painter);
283 void DrawingView::mousePressEvent(QMouseEvent * event)
285 if (event->button() == Qt::LeftButton)
287 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
288 collided = document.Collided(point);
291 update(); // Do an update if collided with at least *one* object in the document
294 toolAction->MouseDown(point);
296 else if (event->button() == Qt::MiddleButton)
299 oldPoint = Vector(event->x(), event->y());
300 // Should also change the mouse pointer as well...
301 setCursor(Qt::SizeAllCursor);
305 void DrawingView::mouseMoveEvent(QMouseEvent * event)
307 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
309 if (event->buttons() & Qt::MiddleButton)
311 point = Vector(event->x(), event->y());
312 // Since we're using Qt coords for scrolling, we have to adjust them here to
313 // conform to Cartesian coords, since the origin is using Cartesian. :-)
314 Vector delta(point, oldPoint);
315 delta /= Painter::zoom;
317 Painter::origin -= delta;
319 UpdateGridBackground();
325 // Grid processing...
327 // This looks strange, but it's really quite simple: We want a point that's
328 // more than half-way to the next grid point to snap there while conversely
329 // we want a point that's less than half-way to to the next grid point then
330 // snap to the one before it. So we add half of the grid spacing to the
331 // point, then divide by it so that we can remove the fractional part, then
332 // multiply it back to get back to the correct answer.
333 if (event->buttons() & Qt::LeftButton)
335 point += gridSpacing / 2.0; // *This* adds to Z!!!
336 point /= gridSpacing;
337 //200% is ok, gridSpacing = 6 in this case...
338 //won't run into problems until gridSpacing = 1.5 (zoom = 800%)
339 //run into problems with this approach: when zoom level is 200% this truncates to
340 //integers, which is *not* what's wanted here...
341 point.x = floor(point.x);//need to fix this for negative numbers...
342 point.y = floor(point.y);
343 point.z = 0; // Make *sure* Z doesn't go anywhere!!!
344 point *= gridSpacing;
347 //we should keep track of the last point here and only pass this down *if* the point
349 document.PointerMoved(point);
351 if (document.NeedsUpdate())
356 toolAction->MouseMoved(point);
361 void DrawingView::mouseReleaseEvent(QMouseEvent * event)
363 if (event->button() == Qt::LeftButton)
365 document.PointerReleased();
367 //We need to update especially if nothing collided and the state needs to change. !!! FIX !!!
368 //could set it up to use the document's update function (assumes that all object updates
369 //are being reported correctly:
370 // if (document.NeedsUpdate())
372 update(); // Do an update if collided with at least *one* object in the document
375 toolAction->MouseReleased();
377 else if (event->button() == Qt::MiddleButton)
380 setCursor(Qt::ArrowCursor);